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參數(shù)資料
| 型號(hào)： | LM4801MH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1W Stereo Audio Amplifier Plus Adjustable LDO |
| 中文描述： | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| 封裝： | 4.40 MM, TSSOP-28 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 725K |
| 代理商： | LM4801MH |
LDO Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for V
= V
+0.5V (Note 10), V
= V
IN
, C
IN
= C
OUT
= 2.2μF, C
CC
= 33nF,
T
J
= 25C.
Boldface
limits apply for the operating temperature extremes: 40C and 85C.
Symbol
Parameter
Conditions
Min
(Note 7)
Typ
(Note 6)
90
225
0.001
0.4
80
120
0.01
Max
(Note 7)
270
Units
I
Q
Supply Current
I
OUT
= 0mA
I
OUT
= 300mA
V
O
= 0V, SHDN = GND
I
OUT
= 1mA
I
OUT
= 200mA
I
OUT
= 300mA
I
OUT
= 1mA, (V
O
+ 0.5V)
≤
V
I
≤
6V
(Note 10)
100μA
≤
I
OUT
≤
300mA
I
OUT
= 10mA, 10Hz
≤
f
≤
100kHz
10Hz
≤
f
≤
100kHz, C
OUT
= 10μF
V
IH
, (V
O
+ 0.5V)
≤
V
I
≤
6V
(Note 10)
V
IL
, (V
O
+ 0.5V)
≤
V
I
≤
6V
SHDN = GND or IN
SET = 1.3V
V
O
≥
2.5V, I
OUT
= 200mA (Note
12)
I
SINK
= 2mA
FAULT = 3.6V, SHDN = 0V
μA
Shutdown Supply Current
Dropout Voltage
(Note 10), (Note 11)
1
μA
V
DO
mV
220
V
O
Line Regulation
-0.1
0.1
%/V
Load Regulation
Output Voltage Noise
Output Voltage Noise Density
SHDN Input Threshold
0.002
37
190
%/mA
μV
RMS
nV/
e
n
V
SHDN
2
V
0.4
100
2.5
280
I
SHDN
I
SET
V
FAULT
SHDN Input Bias Current
SET Input Leakage
FAULTDetection Voltage
0.1
0.1
120
nA
nA
mV
FAULT Output Low Voltage
FAULT Off-Leakage Current
Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
Start-Up Time
0.115
0.1
160
0.25
100
V
nA
I
FAULT
T
SD
C
10
120
T
ON
C
OUT
= 10μF, V
O
at 90% of Final
Value
μs
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC andAC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 2:
The maximum power dissipation is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
and must be derated at elevated temperatures. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
T
A
)/
θ
JA
. For the LM4801, T
JMAX
= 150C. The
θ
JA
for the LM4801 in the 28-pin MXA28A package, when board
mounted and its DAP is soldered to a 2in
2
copper heatsink plane, is 41C/W.
Note 3:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 4:
Machine model, 220pF–240pF discharged through all pins.
Note 5:
All voltages are measured with respect to the ground (GND) pins unless otherwise specified.
Note 6:
Typicals are measured at 25C and represent the parametric norm.
Note 7:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8:
The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 9:
Output power is measured at the device terminals.
Note 10:
Condition does not apply to input voltages below 2.5V since this is the minimum input operating voltage.
Note 11:
Dropout voltage is measured by reducing V
IN
until V
O
drops 100mV from its nominal value at V
IN
-V
O
= 0.5V. Dropout Voltage does not apply to the 1.8
version.
Note 12:
The FAULT detection voltage is specified for the input to output voltage differential at which the FAULT pin goes active low.
L
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